底吹炉是中国恩菲自主开发专利产品，主要应用于炼铜、炼铅工艺，被英国《金属导报》评价为 “技术指明了金属冶炼行业乃至多个领域未来十年、数十年，乃至上百年的发展方向”。目前世界最大底吹炉（卧式回转炉）即出自中国恩菲，处理能力达150万吨精矿/ 年。
氧气底吹炼铅：中国恩菲自主知识产权的先进技术，具有对原料适应性强、有价元素回收率高、能耗低、环保好、作业率高、操作简单、炉寿长、投资少等突出优点。中国恩菲开发设计了ф3.8×11.5m、ф4.1×14m、ф4.4×16.5m 等多规格的氧气底吹炼铅炉，已投产了40 多台，分布在国内外众多炼铅厂。中国恩菲还设计并制造了ф3.8×17.5m、ф4.1×17.5m、ф4.1×18.5m 各种规格的底吹还原炉，保证了底吹连续炼铅工艺的实现。 获国家科技进步二等奖、部级科技进步一等奖、部级优秀设计金奖等多个奖项。底吹炼铅法被中国九部委联合发文指定为我国首选炼铅工艺。已成功应用于印度底吹炼铅厂，正进一步向墨西哥、澳大利亚等国家推广。
规模能力：铅冶炼适应3 万吨/5 万吨/8 万吨，最大至25 万吨/ 年粗铅产能。
bottom blowing furnace is initially created by china enfi, and is mainly applied in copper and lead smelting process. it is evaluated by famous
oxygen bottom blowing for lead smelting: it is self-owned patent advanced technology developed by china enfi with outstanding advantages such as flexible adaptability on materials, high recovery of valuable element, less energy consumption, friendly environment protection, good efficiency of working rate, simple operation requirements, long life of the equipment, and economical on investment. china enfi has developed and designed various sized oxygen bottom blowing lead smelting furnace of ф3.8×11.5m、ф4.1×14m、ф4.4×16.5m,among which more than 40 furnaces have been into operation already in different lead smelters at home and abroad. moreover, china enfi has also designed and manufactured various sized bottom blowing reduction furnace of ф3.8×17.5m、ф4.1×17.5m、ф4.1×18.5m to ensure the bottom blowing consecutive lead smelting process realized.
it is honored with second prize of national scientific and technical progress, first prize of ministerial scientific and technical progress, ministerial excellent design gold prize and many other prizes. bottom blowing lead smelting method is designated as the first lead smelting process in china through 9 national ministries and committees jointed issuance of document.
it has been successfully applied in the lead smelter in india, and on the way further popularizing in mexico and australia.
